World number two Roger Federer reached the last eight of the Gerry Weber Open with a 6-3 7-5 win over Ernests Gulbis.
Swiss Federer is pursuing an eighth title in Halle, Germany, and was rarely troubled by the 26-year-old Latvian.
The 33-year-old will now meet German Florian Mayer, who defeated the USA's Steve Johnson 6-3 7-6 (7-4).
Czech third seed Tomas Berdych is also into the third round, and will face Ivo Karlovic, after beating Croatia's Borna Coric 6-3 6-2.
Second seed Kei Nishikori of Japan faces German Dustin Brown in the second round on Thursday, with Spaniard Tommy Robredo and France's Gael Monfils also in action.
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